Valve.



P. WINSOR.

VALVE.

APPLICATION FILED AUGJ. ms.

Patented Ihy 7,1918.

172 ventor A Z'Zarnqy for its object to provide a light weight, in-.

PAUL wmson, or wns'ron, massacnusnr'rs.

VALVE.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed August 1, 1916. Serial No. 112,594.

To all whom it may concern:

Be it known that I, PAUL WINSOR, a citizen of the United States, and aresident of Weston, in the county, of Middlesex and State ofMassachusetts, have invented an Improvement in Valves, of which thefollowing description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing likeparts.

This invention relates to a valve and has expensive and highly eflicientvalve, which is bodily movable and capable of contracting and expandingand coiiperates with its seat to be normally held in operative relationtherewith by the spring action of the valve itself, and without thenecessity of employing othermechanical means or devices for retaining itin its closed position or for imparting to it a spring action.

To this end, the valve is made curved in form and of suitable material,preferably steel or phosphor bronze, and said valve cooperates with acurved seat, with which it is normally held substantially in engagementby the resiliency of the valve itself. The curved valve is made of acircumferential length greater than a semicircle and may be made of anydesired or axial length within limits, and is capable of cotiperatingeither externally or internally with acasin or shellof minimum size andprovided with a port area of maximum amount, which enables the improvedvalve to be substituted in the heads of compressors and other pumps nowon the market for the usual puppet valves therein, with an increase inefliciency in said pumps or compressors and without the necessity ofchanging said heads.

These and other features of this invention will be pointed out in theclaims at the end of this specification.

Figure 1 is a vertical central section of a suflicient portion of acylinder provided with valves embodying this invention.

Fig. 2, a section on the line 22, Fig. 1, showing a portion of thecylinder and valves, the inlet valve being shown closed and the outletvalve open.

Figs. 3 and 4, enlarged sections of the valves and their shells orcasings shown in Fig. 1, the section being taken on the line 22, Fig. 1,and the inlet valve being open and the outlet valve closed, and

Fig. 5, a detail of one of the valves removed.

Referring to the drawing, a represents the cylinder and b the piston ofa pump of any known or usual construction, andv in the present instancethe cylinder a has detachably secured to it a cap or head 0, whichcooperates with a partition. wall 0? extended from the cylinder head eto form chambers f, g, which contain valves 71., z, embodyin thisinvention. The chamber f is provide with an inlet pipe 10 and thechamber 9 with an outlet pipe 12 in the removable head or cap a. Thechamber f is designed to communicate with the cylinder a through thevalve h, and the chamber 9 through the valve z. The valve 1: is providedwith a valve proper, which in accordance with this invention is madecurved in form and of suitable material, such as steel or phosphorbronze, the said valve also being made thin and light and capable ofexpanding and contracting and of being moved bodily, and in the presentinstance the valve proper is made as a split ring 12 (see Fig. 5), whichis located within a casing or shell, which is preferably made as hereinshown and consists of a cylinder 14 provided at its opposite ends withheads 15, 16, and in its body portion with a plurality of openings orports 17, with which the valve 12 cooperates to close and open the same.

The head 16 of the valve cylinder or casing 14 is detachably secured tothe head e of the piston cylinder a, as by screw-threads 18, and isprovided with a port 19 which connects the interior of the valve casingwith the cylinder a.

In the. resent instance, the cylindricalbody 14 of the valve casing isprovided on its interior with annular flan es o'r ribs 20, 21, at thetop and bottom 0 the ports 17 in said casing, and said annular flangesare in the same circle as the inner surface of one section or web of thecasing 14, marked 22, which separates two adjacent ports 17, while theother sections or webs of the casare -marked 23 are thinner and havetheir inner surfaces in a different circle from that in which theflanges 20, 21, are located, for a purpose as will be described.

The thicker web 22 cooperates with the annular flanges 20, 21, to form aseat for .the curved valve 12, which has its free ends located onopposite sides of a pin or jection 24 extended radially inward romsubstantially the center of the thicker'web 22, and said pin orprojection acts as a stop or centering device to limit bodily movementof the valve annularly, and thereby prevent displacement of the valveannularly with relation to the ports 17.

Provision is also made for limiting axial movement of the valve inopposite directions, and to this end, lugs 01' projections 25, 26, arearranged at the opposite ends of the casing 14 so as to be above andbelow the valve 12, as clearly shown in Fig. 1.

The lugs 25 located at one end of the cylindrical casing 14 areseparated from the lugs 26 located at the opposite end of the casing 14by a distance, which is slightly greater than the axial length of thevalve 12, but not sufliciently great to permit axial movement, whichwould enable the ports to be uncovered by such axial movement.

The valve 12 when located within the casing 14 is normally expanded bythe spring action of the valve itself and makes a substantially tightfit with its seat; that is, its ends engage the web 22 and its bodyportion the flanges 20, 21, with the result that the ports 17 areclosed. Thiscondition is represented in Figs. 1 and 2. When the valve 12is contracted, its ends are moved away from the web 22 and its bodyportion away from the flanges 20, 21, which opens the ports 17 and afree passage is afforded through the space 30 (see Fig. '3), between thevalve 12 and the web 22 and flanges 20, 21.

The valve thus described, may be termed an internal valve, which isrepresented by the valve 71. in Fig. 1, but it is not desired to limitthe invention in this respect, as the invention may, equally as well, beembodied in an external valve, which is represented by the valve 2' inFig. 1.

In this latter case, the valve 12 is located on the outside of the valvecasing 14, the flanges 20, 21, are likewise located, as is the stop pin24 and axial stops 25, 26, and the webs 23 are located within the circleof the flanges 20,21, and the exterior surface of the thicker web 22,all as clearly shown by the valve 2' in Figs. 1, 2 and 4. In the case ofthe external valve, the valve proper 12 is seated by its contraction asshown in Fig. 4, and opened by its expansion.

In Fig. 1, the valve 7:. may be considered the inlet valve and the valve71 the outlet shown in Fig. 1, the valves k, z are shown in thecondition they would be in, with the, piston 6 making its discharge orupward stroke in the direction indicated by the arrow 40. In this case,the valve proper 12 of the inlet valve h, is closed by the expansion ofthe valve itself assisted by pressure of the fluid being forced out ofthe cylinder a by the piston b, and the valve proper 12 of the outletvalve '2' is opened, being expanded by the pressure of the fluid actingon the inner side of said valve.

On the downstroke of the piston in the direction opposite to thatindicated by the arrow 40, the valve proper 12 of the inlet valve isopened, being contracted by the pressure in the chamber f assisted bythe suction in the cylinder a, and the valve proper 12 of the outletvalve 2' is closed by the contraction of the valve itself assisted bythe pressure in the chamber 9 and suction in the cylinder a.

It will be observed, that the expansible and contractible valve 12 isheld in its closed position by one of these inherent properties of thevalve itself, which one is used depending upon whether the valve is usedinternally or externally. 7

Furthermore, it will be noticed that the valve itself is placed inoperative relation to its seat by one of these inherent propertieswithout the aid of extraneous mechanical means.

So also, it will be noticed that the valve proper is free to move bodilyin its opening and closing movements and is not restrained in order torender it operative, but is what may be termed a full floating valve,which relies upon its inherent spring action for its operation.

While it may be preferred to make the valve proper as a split cylinderas herein represented, it is not desired to limit the invention in thisrespect, as the valve may be made of a circumferential length greaterthan a semi-circle, or in other words, of suflicient lengthcircumferentially to enable it to operate by its inherent contractionand expansion.

Furthermore, it is not desired to limit the invention to an expansibleand contractible valve of true circular shape, as it may be made ofother curved shapes.

Inasmuch as the valve proper is held to its seat by its inherentexpansion or contraction, it is capable of being used in a verticalposition as herein shown or in any other position.

I have herein described the valve as especially adapted for use withpumps or compressors, but it is not desired-to limit the invention inthis respect.

When the valve proper is located within its casing or shell, it may eplaced within the same by COIItI'aCtiIIgQ-Q t sufiiciently to allow itto be passed throi llgh the port 19 or either head of the casing may bemade removable.

It is preferred tofuiia'ke the webs 23 thinner than the web 2Q, so as topractically enlarge the ports 17, so that a maximum quantity of fluidmay pass into or out of the valve casing when-the valve 12 is opened.

The valve proper 12 may be made from a thin metal strip, which'enablesthe valve to be made light and inexpensive and to be operated by a verylight pressure. F urthermore the valve 12 is bodily movable and notrestrained. and as a result a freer and a fuller opening of the valve isobtained, which is self-cleaning and capable of being used in a valvecasing of minimum size.

Claims:

1. In a valve, in combination, a cal casing closed at one end and openat its opposite end and provided in its body portion with portsseparated by webs, flanges on said bodyportion cooperating with saidports to form valve seats, one of said webs havin one surface in thesame curve as the said anges to form part of the valve seats, anexpansible and contractible split '0 linder cooperating with said seatsand forming the valve vproper to control the opening and closing, ofsaid ports and bodily movable cir- 'cumferentially and axially with.relation to said seats, and means for limiting circumferential and axialmovements of said valve with relation to said ports.

2. In a valve, 'in combination, a curved valve seat, a curved valvebodily movable and capable of contracting and expanding and normallyheld in operative relation to metal strip of alength greater than asemicircle and free to move bodily and capable v of expanding andcontracting and cooperatcylindriing with said valve seat to be heldthereto by the spring action of the strip itself.

In testimony whereof, I have signed my name to this specification.

PAUL 'WINSOR.

